首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   2634篇
  免费   49篇
各国政治   131篇
工人农民   66篇
世界政治   157篇
外交国际关系   67篇
法律   1932篇
中国政治   21篇
政治理论   292篇
综合类   17篇
  2020年   30篇
  2019年   24篇
  2018年   28篇
  2017年   35篇
  2016年   43篇
  2015年   24篇
  2014年   40篇
  2013年   192篇
  2012年   62篇
  2011年   68篇
  2010年   36篇
  2009年   35篇
  2008年   56篇
  2007年   73篇
  2006年   74篇
  2005年   75篇
  2004年   73篇
  2003年   71篇
  2002年   71篇
  2001年   156篇
  2000年   123篇
  1999年   76篇
  1998年   26篇
  1995年   18篇
  1994年   23篇
  1993年   21篇
  1992年   64篇
  1991年   69篇
  1990年   61篇
  1989年   85篇
  1988年   83篇
  1987年   72篇
  1986年   76篇
  1985年   65篇
  1984年   35篇
  1983年   41篇
  1982年   19篇
  1981年   30篇
  1979年   29篇
  1978年   21篇
  1977年   27篇
  1976年   19篇
  1975年   31篇
  1974年   30篇
  1973年   31篇
  1972年   32篇
  1971年   24篇
  1970年   20篇
  1969年   24篇
  1968年   20篇
排序方式: 共有2683条查询结果,搜索用时 31 毫秒
241.
Allele frequencies for 16 STR loci (D8S1179, D21S11, D7S820, CSF1PO, D3S1358, TH01, D13S317, D16S539, D2S1338, D19S433, vWA, TPOX, D18S51, D5S818, FGA, and SE33) were calculated for a sample of 300 unrelated individuals from Greece. No deviations from Hardy–Weinberg equilibrium were observed for all loci. The combined power of discrimination (PD) and the combined power of exclusion (PE) for the 16 tested STR loci were 0.999999999 and 0.999999816, respectively. Population comparisons were carried out and low genetic distances were found between our data and those previously published for other neighbouring European populations.  相似文献   
242.
The distinction of foetal from adult blood stains prepared from 219 cord blood samples was possible, without exception, up to eight months by means of alpha1-fetoprotein precipitation, carried out by immuno-electrophoresis on cellulose acetate (Biotest) instead of agar gel, as described by Patzelt, Geserick and Lignitz. The material carrying the blood stains (glass, wood, paper and linen) did not influence the results.  相似文献   
243.
244.
245.
246.
247.
A case is presented involving a patient who underwent an intrapericardial pneumonectomy for lung cancer and died of cerebral hypoxia due to herniation of the heart. The etiology and pathophysiology of cardiac herniation are reviewed.  相似文献   
248.
Abstract: The frequency and characteristics of suicide by cop cases (SBC) among a large (n = 707) nonrandom sample of North American officer-involved shootings (OIS) were investigated. “Suicide by cop” is when a subject engages in behavior which poses an apparent risk of serious injury or death, with the intent to precipitate the use of deadly force by law enforcement against the subject. Thirty-six percent of the OIS in this sample were found to be SBC with high interrater agreement (intraclass correlation coefficient = 0.93) for category classification. SBC cases were more likely to result in the death or injury of the subjects than regular OIS cases. Most SBC cases were spontaneous, but had clear verbal and behavioral indicators that occurred prior to, and during the event. Findings confirm the trend detected in earlier research that there was a growing incidence of SBC among OIS. SBC individuals had a high likelihood of possessing a weapon (80%), which was a firearm 60% of the time. Half of those with a firearm discharged it at the police during the encounter. Nineteen percent simulated weapon possession to accomplish their suicidal intent. Other findings highlight the histories and commonalities in this high risk group.  相似文献   
249.
250.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号